WASHINGTON, June 24 (Reuters) -President Donald Trump'snominee to become the top U.S. general in Europe says he believes Ukraine could prevail againstRussia's more than three-year-old invasion. "I think Ukraine can win," Air Force Lieutenant GeneralAlexus Grynkewichsaid in testimony at his June 24 Senate confirmation hearing. "I think any time your own homeland is threatened, you fight with a tenacity that's difficult for us to conceive of." This article originally appeared on USA TODAY:Trump's pick for top US general in Europe says 'Ukraine can win' war